wheel question

im in the market to get some new wheels, i have a 97 impreza wagon thats dropped about 1.75 inches, i was wondering if i can fit a 17*8 with a 47 offset, if so what size tires should i get so that the tire is flush with the side of the rim, not bulging or toed in? or if u can gimme a better idea on where to find out, that would help to, thanks alot guys